Driving mechanism.



No. 797,029. PATENTED AUG, 15, 1905.

J. ULRICH.

DRIVING MECHANISM.

APPLICATION FILED OUT. 22, 1904.

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C. Stou ghion. 8263526 I I raga BY I ATTORNEYS PATENT OFFICE.

JOHN ULRICH, OF COLUMBUS, OHIO.

DRIVING MECHANISM.

Specification of Letters Patent.

Patented Aug. 15, 190

Application filed October 22, 1904. Serial No. 229,534..

To all whom it may concern:

Be it known that I, JOHN ULRICH, a citizen of the United States,residing at Columbus, in the county of Franklin and State of Ohio. haveinvented a certain new and useful Improvement in Driving Mechanism, ofwhich the following is a specification.

My invention relates to a new and useful improvement in drivingmechanism for drills,

cutters, and the like.

The object of the invention is to provide simple means of superiorconstruction for transmitting motion and driving the several parts.

Another feature resides in gears traveling at unequal speeds and a stopmechanism arranged between the gearsto automatically cut off the powerwhen one gear has gained a full revolution on the other.

Finally, the object of the invention is to provide a device of thecharacter described that will be strong, durable, and eflicient andsimple and comparatively inexpensive to make and one in which theseveral parts. will not be liable to get out of working order.

With the above and other objects in view the. invention consists of thenovel details of construction and operation, a preferable embodiment ofwhich is described in the specification and illustrated in theaccompanying drawings, wherein Figure 1 is an under side plan view withthe bottom of the casing removed for more clearly illustrating theparts. Fig. 2 is a vertical sectional view taken on the line a' m ofFig. 1. Fig. 3 is a side elevation, the casing being removed. Fig. 4 isa plan view of the parts shown in Fig. 3, and Fig. 5 is a cletailed viewshowing the upper gear in section on the line yy of Fig. 1 and thestop-clog and other portions in elevation.

In the drawings the numeral 1 designates the drive-shaft, which isformed with an integral laterally-extending head 2. The head 2 isadapted to fit in a registering recess 3 of a drive-gear 4. Thedrive-gear 4 is formed upon its upper surface with an'annular ringprojection 5, formed with an angular groove 6. A gear 7 provided with ashouldered sleeve 8, loosely encircling the drive-shaft 1, is formed inits under surface with an annular recess 9 and a downwardly-projectingtrack portion 10, which registerand engage with the annular ring 5 andgroove 6 of the drivegear 4, as clearly shown in Fig. 2. The track 10 isformed with a V-shaped recess 11 at one side, adapted to receive around-pointed dog 12, carried by the drive-gear 4t and a notched plate13. The dog 12 is set into the notched plate 13, so as to lie flush withthe periphery thereof when the same revolves, which it is caused to doby a key 14, securing the said plate to an extension 15 of the shaft 1.It will be apparent by observing Fig. 5 that the V-shaped recess 11 isslightly wider than the point of the dog 12, and owing to the fact thatthe gear 1 revolves at a higher rate of speed than the gear 7 whenmotion is imparted to the said gears the rounded end of the dog12 willbe caused to ride down one of the inclined walls of the recess 11 andtravel on the surface of the annular track 10 until the said fast gearhas gained a complete revolution upon the slow gear, when the dog willdrop into the recess 11 and momentarily lock the two gears togetherafter the said dog has traveled completely around the track.

For forcing the dog 12 into the recess 11 I provide a flat spring 16,which is securely held in a cut-away recess 17 in the head 2 of theshaft 1, which cut-away recess not only holds the spring, but allows itfree play, as is obvious by observing Fig. 2. The dog 12 is likewiseformed with a cut-away opening 18, into which the opposite end of thespring is passed, as clearly shown in Fig.2. In Fig. 2 the dog is shownas resting in the recess 11, and it is readily discernible that when thedog is forced downward onto the track 10 the spring 16 is also bent downward, thus holding the dog under tension and readily forcing it intoengagement with the recess llwhen the latter passes over the said dog.The dog is formed at its lower end with an annular recess 19, which isadapted to receive the end of a rod 20, connected to a suitable cut-offmechanism, which when the said rod enters the recess 19 cuts off thepower, thereby stopping the movement of the parts. When the parts arestarted, the rod 20 is moved backward, thus withdrawing it from therecess 19 and operating the cut-off, so that the parts start, therebyforcing the dog downward. The rod 20 being in line with the plate 13will bear against the periphery thereof during its revolution and alsoagainst the face of the dog 12 until it is forced into the recess 11.The essence of this invention, however, resides in the driving mechanismand its parts. For the purpose of supporting and inclosing the parts Iprovide a casing 21, which is formed With a tubular extension 22,surrounding the sleeve 8 of the gear 7 and otherwise suitablyconstructed and arranged to inclose the parts.

The numerals 23 indicate portions of links or pitmen which are connectedto the pistons of a suitable engine. The pitmen 23 are pivoted upon thewrist-pins 24 of cranks 25. The cranks 25 are formed integral withshafts 26, upon which are formed pinions 27 in mesh with the drive-gear4. It is to be observed that the cranks are arranged at a quadrant toeach other or one crank a quarter of a revolution in advance of theother, so as to facilitate the starting of the drill. The shafts 26 attheir upper ends carry eccentrics 28, about which are arranged rings 29,formed on the ends of valve rods 30, which are suitably formed andconnected with the valve mechanism of the suitable engine with which thepitmen 23 are connected. The cams and camrings are arranged tocorrespond with the positions of the cranks 25, so as to lead the same.It is apparent that the pinions 27 transmit motion to the drive-geare. Astub-shaft 31, having a screw-threaded engagement with the casing 21, isarranged centrally between the pinions 27 and is formed at its lower endwith a head 32, through which the rod 20 of the stop mechanism passes,thus forming a support for the same.

Loosely confined upon the stub-shaft 31, between its head 32 and awasher-nut 33, is a double-faced pinion 3 1, formed with a large ring ofteeth 35, engaging with the drive-gear 4E, and a smaller ring of teeth36 in engagement with the larger gear 7 the large gear 4 transmittingmotion to the double-faced pinion 34 by means of the teeth 35 and thelatter transmitting motion to the large gear 7 by its teeth 36. It isobvious from this that motion is applied directly to the drive-gear anddriveshaft, which imparts motion through the double-faced pinion 3 1 tothe large gear 7 and also that the drive-gear4 revolves at a higher rateof speed than the large gear 7. It is, however, to be further understoodthat the differences in speed of the two gears is slight and that thedrive-shaft 1 will be revolved a great number of times before thedrive-gear 1 gains a complete revolution upon the drivegear 7 In view ofthe foregoing description it is not thought necessary to set forth theoperation of the device in detail. A suitable tool or tools beingconnected to the drive-shaft and the rod 20 being moved backward, motionis imparted to the parts, and the gears Will revolve until the dog 12 isforced into the recess 11 by the spring 16 and the rod 20 moved forwardby its engagement with the recess 19, thus cutting oi the power andstopping the parts.

Having now fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

1. In adevice of the character described, the combination with adrive-shaft and a fast gear and a slow gear, of driving means comprisingcrank-shafts, means operated by the crankshafts for transmitting motionto the fast gear, and rotatable means in engagement with the fast gearfor transmitting motion to the slow gear.

2. In a device of the character described, the combination with adrive-shaft and a fast gear and a slow gear, of driving means comprisingcrank-shafts one set in advance of the other, pinions mounted upon thecrank-shafts engaging with the fast gear, eccentrics mounted upon thecrank-shafts, a pinion meshing with and driven by the fast gear, and asecond pinion meshing with the slow gear and connected to and driven bythe last-named pinion.

3. In a device of the character described, the combination with adrive-shaft and a fast gear and a slowgear, of driving means comprisingcrank-shafts in connection with pitmen of a suitable engine, onecrank-shaft being set in advance of the other, pinions carried by thecrank-shafts and meshing with the fast gear for driving the same, adouble-faced pinion meshing with both the fast and the slow gears, andmeans for rotatably supporting the said double-faced pinion.

JOHN ULRICH. In presence of- A. L. PHELPS, M. B. SCHLEY.

